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mitem_userptr - associate application data with a menu item
int set_item_userptr(ITEM *item, void *userptr);
void *item_userptr(const ITEM *item);
Every menu item has a field that can be used to hold application-specific data (that is,
the menu-driver code leaves it alone). These functions get and set that field.
Except for item_userptr (which returns NULL on error), each function returns one of the
E_OK The routine succeeded.
System error occurred (see errno).
The header file <menu.h> automatically includes the header file <curses.h>.
These routines emulate the System V menu library. They were not supported on Version 7 or
The user pointer should be a void pointer. We leave it as a char pointer for SVr4 compat-
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond.
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